By Luis Lopez, AI transportation consultant, CEO of Go Hub.io Holdings Corp and subsidiaries, and host of the Freight Guru Podcast
An empty export container arrives at your dock, and the clock starts. There is pressure to load it, seal it, and get it back to the terminal before the cutoff. That pressure is exactly why inspections get skipped. A few minutes spent checking the box before the first pallet goes in can prevent wet cargo, contamination, rejected loads, and disputes over who caused the damage. This guide walks through a practical pre-load inspection and the documentation that should go with it.
Why Inspect Before Loading
When a shipper loads and seals a full container, the shipper is generally responsible for the condition of the stow. If cargo arrives damaged, the first question will be whether the damage came from the container, the loading, or the voyage. A documented inspection is the shipper’s best evidence that the box was sound when it was received. It also gives you a basis to reject a defective container before it becomes your problem.
Exterior Check
Walk all four sides and look at the roof if you can do so safely from a platform or by using a camera. Look for:
- Holes, cracks, or tears in side panels, front wall, and roof.
- Heavy dents that push into the interior and could damage cargo.
- Patches or welds that look poorly done or are separating.
- Damaged corner castings or bent corner posts, which can affect safe handling and stacking.
- Old labels, placards, and markings from previous cargo, especially hazardous materials placards.
Previous hazmat placards that do not apply to your shipment should be removed. A box showing placards for cargo it does not carry creates confusion for handlers and inspectors, and if your shipment is hazardous, the correct placards must be applied.
The CSC Plate
Containers in international service carry a safety approval plate under the International Convention for Safe Containers, usually on the door. The plate shows identification and approval information and indicates whether the container is under a periodic examination scheme or an approved continuous examination program. If the plate is missing, illegible, or shows an expired examination date, raise it with the provider of the container before loading.
Doors, Gaskets, and Locking Gear
- Open and close both doors fully. They should swing without forcing.
- Check hinges, locking bars, cams, and handles for damage or missing parts.
- Inspect the rubber door gaskets. Torn, missing, or flattened gaskets let water in.
- Confirm the seal hasp and locking bar can accept a seal properly.
Interior Check and the Light Test
Step inside and inspect the walls, ceiling, and floor. The interior should be clean, dry, and free of debris, nails, residue, and pests.
The light test is simple: with someone outside, close the doors while you stand inside. In darkness, any pinhole or crack in the roof, walls, or door area will show as light. Light means water can get in. A box that fails the light test should be repaired or swapped.
Floor Condition
Most containers have wooden floors, and the floor takes the full concentrated load of forklifts and cargo. Check for:
- Soft spots, cracks, broken boards, or holes.
- Protruding nails or screws that can puncture packaging.
- Stains from oil, chemicals, or previous spills.
- Uneven repairs that create trip points for forklift wheels.
If a forklift will enter the container, the floor must be able to handle it safely. A damaged floor is both a cargo risk and a safety risk for the operator.
Odor and Cleanliness
Smell matters, especially for food, packaging materials, textiles, and anything absorbent. A container that held chemicals, fertilizer, or strong-smelling cargo can taint your product. Moisture odors suggest leaks or condensation history. If the interior smells, do not load food-grade or sensitive cargo into it. Ask for a different box.
Photo Documentation
Photos are the record that survives after the container leaves your dock. A good set includes:
- The container number and the CSC plate.
- All four exterior sides and any damage found.
- The empty interior from the doors, plus close-ups of floor and wall condition.
- The cargo partially loaded and fully loaded, showing blocking and bracing.
- The closed doors with the seal applied, with the seal number readable.
Store photos with the shipment reference so they can be found later. Timestamps and location data help if a claim arises.
Load Securing
Ocean containers move through cranes, ships rolling at sea, rail, and trucks. Cargo that is not secured will shift. Good practice includes:
- Distributing weight evenly along the length and width of the floor, without concentrating heavy cargo at one end.
- Placing heavier items low and lighter items on top.
- Filling voids with dunnage, airbags, or blocking so cargo cannot slide.
- Bracing the door end so cargo does not press against the doors.
- Using straps, lashings, or timber bracing for heavy or irregular items.
Industry guidance such as the IMO/ILO/UNECE Code of Practice for Packing of Cargo Transport Units is a useful reference for packers.
Seals
Apply the seal assigned to the shipment, record the number on the shipping documents, and photograph it in place. High-security bolt seals meeting ISO 17712 are the common standard for international container shipments. Make sure the seal number on the bill of lading matches the seal on the door. A mismatch can trigger delays or inspections.
Verified Gross Mass
Under the SOLAS convention, a packed export container must have a verified gross mass provided by the shipper before it can be loaded onto a vessel. The weight can be obtained by weighing the packed container or by using an approved method of weighing the contents and adding the container’s tare weight. Carriers and terminals set cutoff times for VGM submission, and a missing or late VGM can keep a container off the planned vessel. Check the specific requirements with your carrier or forwarder.
Where AI Fits In
As an AI transportation consultant, I see inspection as a natural place for structured digital checklists. Mobile inspection tools can require each checkpoint and photo before the load is released. Computer vision can help read container numbers and seal numbers from photos and flag mismatches with booking data. Some tools can highlight visible damage in images for a person to review. The human inspection still matters most. Software can organize evidence, but it cannot smell a contaminated box or feel a soft floor.
The Bottom Line
Inspect every export container before loading: outside, inside, doors, floor, odor, and plate. Photograph what you see, secure the load, seal it correctly, and submit an accurate VGM. When something goes wrong at destination, that record is what protects you.
Related reading: container sizes explained, shipper’s load and count liability, and FCL vs. LCL shipping.
For more conversations on freight and AI, subscribe to the Freight Guru Podcast.
About the author: Luis Lopez is a Miami-based AI transportation consultant and logistics entrepreneur, the CEO of Go Hub.io Holdings Corp and subsidiaries, and host of the Freight Guru Podcast.
